This was the face of artificial intelligence for the 18th century. The watchmaker Abraham Louis Breguet made this pocket watch out of gold and rock crystal for French queen Marie Antoinette. It, and 39 other watches stolen from an Israeli museum 25 years ago, just turned up mysteriously. They also include another Breguet watch, the ingenious self-winding Sympathique, and a pistol watch. Image by David Silverman, Getty Images.